Achalasia and esophageal carcinoma: is surveillance justified?
Farr
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CM
D004931:Esophageal Achalasia / Q000150:complications*; D004938:Esophageal Neoplasms / Q000175:diagnosis / Q000209:etiology*; D004945:Esophagoscopy; D006801:Humans; D012307:Risk Factors